By WIN GRUENING By now, most Alaskans have heard of a jökulhlaup, a phenomenon where unstable lakes are formed from retreating glaciers that can result in a glacial outburst. The Mendenhall Glacier in Juneau has created such a lake, Suicide Basin. Hydrologists estimate it contained 14.5 billion gallons of water before it burst on Aug. 5 … Continue reading Win Gruening: Amid Juneau disaster recovery, attention turns to mitigation of future floods